Display Substrate Grid Power Layout for Flexible OLED Signal Integrity
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Solution Overview
Problem
Existing display technologies face challenges in efficiently transmitting power supply signals across flexible display substrates with complex circuit layouts, particularly in flexible OLED and QLED devices, which can lead to inefficiencies and potential signal interference.
Innovation Solution
A display substrate design featuring a grid communication structure with multiple power supply lines and connection lines arranged in intersecting directions, forming a network that connects pixel drive circuits to light emitting devices, ensuring efficient power signal transmission and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional power supply line arrangements are used in flexible display substrates, then device simplicity is maintained, but power supply signal transmission efficiency deteriorates and signal interference increases
Solution Approach 1:
The patent transitions from traditional linear or radial power supply line arrangements to a grid-based two-dimensional network structure. Connection lines extend in a first direction (e.g., horizontal) while power supply lines extend in a second direction (e.g., vertical), creating intersecting pathways that enable efficient signal distribution across the flexible substrate without requiring excessive line length or complexity.
Solution Approach 2:
The power supply network is segmented into multiple independent connection lines and power supply lines that form discrete grid units. Each grid intersection can independently serve nearby pixel drive circuits, distributing the power delivery function across many small units rather than relying on a few long transmission lines, thereby reducing interference and improving efficiency.
2Area of stationary object
If power supply lines are extended to cover large areas of flexible substrates, then signal coverage is improved, but signal interference and transmission losses increase
Solution Approach 1:
By creating a two-dimensional grid network rather than extending single long lines, the patent achieves comprehensive area coverage through multiple short perpendicular segments. The intersection of connection lines in one direction with power supply lines in another direction creates numerous access points distributed across the entire substrate area, reducing the need for long individual transmission paths and minimizing signal interference.
3Adaptability or versatility
If complex circuit layouts are used to accommodate flexible display requirements, then device flexibility is achieved, but power supply signal transmission efficiency deteriorates
Solution Approach 1:
The grid communication structure serves multiple functions simultaneously: it provides power supply signal distribution, enables signal routing in flexible configurations, and maintains transmission efficiency across varying device geometries. The same grid framework adapts to different flexible display layouts without requiring redesign, as the orthogonal line intersections can accommodate various circuit arrangements while maintaining optimal signal transmission paths.
Data Source
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AI summary
A display substrate and a preparation method therefor, and a display apparatus. The display substrate comprises a drive structure layer and a light-emitting structure layer, wherein the drive structure layer comprises a first pixel drive circuit, a second pixel drive circuit and a third pixel drive circuit; and the light-emitting structure layer comprises a first light-emitting device, a second light-emitting device and a third light-emitting device, wherein the first light-emitting device is connected to the first pixel drive circuit, the second light-emitting device is connected to the second pixel drive circuit, and the third light-emitting device is connected to the third pixel drive circuit. The drive structure layer further comprises a first power supply line, a second power supply line, a third power supply line and a connecting line, wherein the first power supply line is connected to the first pixel drive circuit, the second power supply line is connected to the second pixel drive circuit, the third power supply line is connected to the third pixel drive circuit, and the connecting line is connected to the first power supply line, the second power supply line or the third power supply line, so as to form, on the display substrate, a grid communication structure for transmitting a power supply signal.